Re: st: biprobit

[Axel Heitmueller <Axel.Heitmueller@dwp.gsi.gov.uk>]

Fatma,

you might want to try and estimate your two equations using heckprob in which case you also get a rho if that is what you are after. In any case it allows for more flexible estimation and variable restrictions.

Axel

bircan@metu.edu.tr 08/07/2004 16:29

To:    statalist@hsphsun2.harvard.edu@internet     cc:    (bcc: Axel Heitmueller/London/Asd)     Subject:    st: biprobit

Fatma Bircan

Middle East Technical University

Department of Economics

210-2032

Hi,

I try to estimate a double selection model for the labour force

participation (probit 1) and self-employement vs wage employement

choice (probit 2). I use biprobit command and the error message I get

is the following

error . . . . . . . . . . . . . . . . . . . . . . . Return code

2000

no observations;

You have requested some statistical calculation and there are

no observations on which to perform it. Perhaps you specified

if exp or in range and inadvertently filtered all the data.

Obviously the number of observations for LFP is greater than the ones

who only choose b/w self-employement and wage-employement.

How should I specify my dependent variables so that both have the same

number of non-missing observations

Any help appriciated

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